The flashback data of Oppoa9 SMS function cannot be cleared or backed up.

How to deal with the problem that OPPO mobile phone application cannot be opened after flashback;

1. If there are too many data and caches stored in the mobile phone's own application, which leads to abnormal operation, I suggest you go to "Settings >"; (Application) > Application Management > Application List > Select Flashback Application >: Storage Occupancy "to clear application data and cache.

2. Confirm whether the application version is up to date. It is recommended to try to upgrade to the latest version.

3. Try to restart the phone.

If the above methods still can't solve your problem, I suggest you take your mobile phone and purchase certificate to the nearest OPPO customer service center for testing by professional engineers.